diff --git a/document.tex b/document.tex
index 2ebe390..92c72d7 100644
--- a/document.tex
+++ b/document.tex
@@ -14,6 +14,7 @@ Occasionally, I make up some definitions to play with. These definition blocks w
 \input{./src/topology/index}
 \input{./src/fa/index}
 \input{./src/measure/index}
+\input{./src/harmonic/index}
 \input{./src/dg/index}
 \input{./src/op/index}
 \input{./src/dyn/index}
diff --git a/src/harmonic/index.tex b/src/harmonic/index.tex
new file mode 100644
index 0000000..714fa52
--- /dev/null
+++ b/src/harmonic/index.tex
@@ -0,0 +1,5 @@
+\part{Harmonic Analysis}
+\label{part:harmonic}
+
+\input{./lcg/index.tex}
+\input{./notation.tex}
diff --git a/src/measure/lcg/algebra.tex b/src/harmonic/lcg/algebra.tex
similarity index 100%
rename from src/measure/lcg/algebra.tex
rename to src/harmonic/lcg/algebra.tex
diff --git a/src/measure/lcg/haar.tex b/src/harmonic/lcg/haar.tex
similarity index 100%
rename from src/measure/lcg/haar.tex
rename to src/harmonic/lcg/haar.tex
diff --git a/src/measure/lcg/index.tex b/src/harmonic/lcg/index.tex
similarity index 100%
rename from src/measure/lcg/index.tex
rename to src/harmonic/lcg/index.tex
diff --git a/src/measure/lcg/lcg.tex b/src/harmonic/lcg/lcg.tex
similarity index 100%
rename from src/measure/lcg/lcg.tex
rename to src/harmonic/lcg/lcg.tex
diff --git a/src/measure/lcg/modular.tex b/src/harmonic/lcg/modular.tex
similarity index 100%
rename from src/measure/lcg/modular.tex
rename to src/harmonic/lcg/modular.tex
diff --git a/src/harmonic/notation.tex b/src/harmonic/notation.tex
new file mode 100644
index 0000000..e5d8a81
--- /dev/null
+++ b/src/harmonic/notation.tex
@@ -0,0 +1,3 @@
+\chapter{Notations}
+\label{chap:harmonic-notations}
+
diff --git a/src/measure/index.tex b/src/measure/index.tex
index 89049e7..6e4164d 100644
--- a/src/measure/index.tex
+++ b/src/measure/index.tex
@@ -9,5 +9,4 @@
 \input{./lebesgue-integral/index.tex}
 \input{./bochner-integral/index.tex}
 \input{./weak-integral/index.tex}
-\input{./lcg/index.tex}
 \input{./notation.tex}